CVE-2021-45951: Buffer Overflow
First published: Fri Dec 31 2021(Updated: )
** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and FuzzCheckForBogusWildcard). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge."
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Thekelleys Dnsmasq | =2.86 | |
| =2.86 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-45951?
The severity of CVE-2021-45951 is critical with a CVSS score of 9.8.
What is the affected software for CVE-2021-45951?
The affected software for CVE-2021-45951 is Dnsmasq version 2.86.
What is the CWE ID for CVE-2021-45951?
The CWE ID for CVE-2021-45951 is CWE-119 and CWE-787.
How can I fix the heap-based buffer overflow vulnerability in Dnsmasq version 2.86?
To fix the heap-based buffer overflow vulnerability in Dnsmasq version 2.86, update to a version that includes the necessary patches and security updates.
Where can I find more information about CVE-2021-45951?
More information about CVE-2021-45951 can be found in the provided references: [Link 1](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35868), [Link 2](https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-924.yaml), [Link 3](https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html).
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